provided through the ?rst ?ange; and a handcuff key or other

device may be inserted through the opening to engage the

spring to release the pin, This then releases the locking plateto remove the trigger lock.

5,048,212

9/1991 Mossbefg -

5,724,760

3/1998 Langner.

5,910,002

6/1999 Hunter ................................. .. 42/7007

11 Claims, 2 Drawing Sheets

May 2, 2000

WWII"

Sheet 1 0f 2

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6,055,759

U.S. Patent

May 2, 2000

Sheet 2 0f 2

\20F/G.

24

'I

..

7-|

6,055,759

6,055,7591

TRIGGER LOCKBACKGROUND

?rearm. The extension in the Mossberg device is uniform in

cross section throughout its length; and it extends from theside of the ?ange and the trigger guard When the device is

Handguns are in Widespread use, both by laW enforce

ment agencies and by people Who carry guns for their oWn

inserted past the trigger and beyond the trigger guard on theopposite side. A hole is provided through the extension forinsertion of a locking cable, Which then is used to preventremoval of the Mossberg device and use of the gun When the

protection. Inadvertent discharge of such handguns fre

quently occurs through mishandling of a gun in a casualmanner by someone Who is unaWare that the gun is in ?ring

trigger is to be locked, relatively permanently, against use.

Other types of trigger locks have been designed in the

condition (chamber loaded). Devices have been designed to

devices include safety locks built into the guns, as Well as

form of devices Which place a bar in front of the trigger. This

makes the locking device itself dangerous to use, because of

slide buttons in the rear of the trigger guard. Some devices

employ locks With keys. Others are cumbersome and dif?

the potential of the locking bar itself actuating the trigger

during installation. Conventional trigger locks of this type

lock the trigger of a gun against inadvertent actuation. Such

10

usually come With an instruction Which Warns the user to

cult to use.

A number of devices have been proposed for trigger

15

blocks of the type intended to prevent intentional misuse or

unauthoriZed use of handguns. Blocks of this type are not

really locks in the sense that they prevent unauthoriZed use;

but such trigger blocks operate primarily as safety devices.Blocks of this type are particularly desirable for guns carriedby police of?cers. Some trigger block devices are in the formof Wedges Which are placed behind the trigger, betWeen the

20

unload gun prior to use. If that Warning is not heeded an

accidental discharge can occur. Even if the Warning isheeded, accidents are prone to happen When unloading andloading a ?rearm to install such trigger locks.It is desirable to provide a simple to use, compact andeffective trigger lock Which may be used on a loaded gun, as

Well as unloaded guns, and Which is simple in construction

and effectively prevents unauthoriZed removal.

trigger and the trigger guard. These Wedges then are pushedout of the Way When the gun is to be ?red. Other safety

blocks include plates Which are engaged by the ?nger of the

SUMMARY OF THE INVENTION

25

user to rotate or release the plates in order to ready the gun

for ?ring.

improved trigger lock for a handgun.

A danger, particularly With respect to handguns, occurs

When such handguns are stored at home or brought home by

30

a laW enforcement of?cer. Children are very curious about

handguns, and even though admonished not to do so, they

Will pick up and handle a handgun if it is accessible to them.Consequently, there has been a great interest in providing

locks Which prevent the operation of the handgun and

prevent operation of the trigger to ?re the handgun.One type of trigger safety device, Which functions to

It is an object of this invention to provide an improved

trigger lock for a gun.It is a further object of this invention to provide anIt is an additional object of this invention to provide an

improved trigger lock device for a handgun Which is easy to

use and Which snaps into place to securely lock the trigger.It is a further object of this invention to provide an

35

improved trigger lock device for guns, Which is placed

behind the trigger and Which includes ?anges Which snaptogether on opposite sides of the trigger to secure the device

in place.

prevent use of a handgun is disclosed in the Langner US.

In accordance With a preferred embodiment of the

Pat. No. 5,724,760. The Langner patent discloses a trigger

invention, a trigger lock is designed for guns having a trigger

block devices, Which primarily is designed as a block to be

40

guard and a trigger, With a space betWeen the rear of the

45

trigger and the guard. The lock includes a rigid plug With acentral portion con?gured to ?t into the space betWeen therear of the trigger and the trigger guard to prevent depressionof the trigger to ?re the gun. One side of this rigid plug hasa ?ange Which overlies and engages at least part of the

placed behind the trigger of the handgun at all times, and

Which readily may be moved out of engagement With thetrigger When the handgun is desired to be used. The Langnerblock, hoWever, also includes a projection beyond one sideof the trigger With a hole through it. A small padlock may be

placed through this hole, Which then prevents movement of

the block from behind the trigger, since the padlock engagesthe trigger guard and trigger if an effort is made to push the

trigger or trigger guard When the plug is inserted into place.

trigger block out of the space behind the trigger. The otherside of the trigger is covered by a ?ange attached to theblock; so that it cannot be moved in the opposite direction.A disadvantage of the device shoWn in the Langner patent,hoWever, is the requirement for the extra padlock, Whichmust be inserted through the hole in the projecting part of thetrigger block in order to lock the device in place. A separatekey, as Well as the separate padlock, must be employed. Ifthe padlock should be misplaced, the trigger block still may

pin is inserted into a corresponding channel in the holloW

interior of the rigid plug to engage a spring, Which thenretains the locking plate in place on the opposite side of the

The other side of the trigger lock comprises a separate

locking plate Which has a pin extending from it. The locking

trigger and trigger guard. To unlock the device, a key, such

as a handcuff key, is inserted through an opening in the rigid

plug to depress the spring, disengaging the locking pin; so

55

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side vieW of a handgun With a preferred

be used; but the safety locking feature clearly Would be

missing.Another trigger blocking and locking mechanism forinsertion behind the trigger of a handgun is disclosed in the

Mossberg US. Pat. No. 5,048,212. In the Mossberg device,

a composite trigger and ?rearm lock assembly includes, in

that the locking plate can be removed.

60

embodiment of the invention shoWn in its position of use;

FIG. 2 is an exploded perspective vieW shoWing differentparts of the embodiment of FIG. 1;FIG. 3 is another exploded vieW shoWing other details ofthe embodiment of FIG. 1;

FIG. 4 is a cross-sectional vieW of the embodiment of

the ?rearm. This trigger block includes a ?ange on one side 65 FIG. 1 taken along the line 44 of FIG. 1;FIG. 5 is a cross-sectional vieW taken along the line 55and an extension perpendicular to the ?ange, con?gured to?t behind the curved rear surface of the trigger of theof FIG. 4;

part, a trigger block Which is inserted behind the trigger of

6,055,7593

FIG. 6 is a cross-sectional vieW of the same portion shown

in FIG. 5 illustrating a different position of use; andFIG. 7 is a cross-sectional vieW taken along the line 77of FIG. 5.

described previously. In addition, an opening 22 is formed

through the rigid plug on the side of the ?ange 20 to permitinsertion of a handcuff key 21, as illustrated in FIGS. 2 and4. A slot 44 is used to guide the projection on the end of the

DETAILED DESCRIPTION

Reference noW should be made to the drawings, in Which

the same reference numbers are used throughout the different ?gures to designate the same components. FIG. 1 is a

side vieW of a handgun 10 of a type commonly used by laW

enforcement of?cers and others. The handgun 10 comprisesa barrel portion 11 and a handgrip portion 12, With a trigger14 enclosed by a trigger guard 16. The handgun Which isdepicted in FIG. 1 is a semi-automatic pistol. Various otherfeatures of the handgun Which are not important to theunderstanding of the present invention Will not be describedhere.As is apparent from an examination of FIG. 1, the trigger14, in its released or ready state, is spaced from both the rearand the front of the trigger guard 16. The space in front of

10

15

When the key shaft 21 is fully inserted, it then is turned

6. This then pulls the spring 50 out of engagement With therecessed portion 32 of the pin 30; so that the pin 30 may be

removed along With the locking plate 28.

FIG. 7 shoWs in solid lines the locked position of the

locking plate 28 and pin 30/32. In the solid line position, theleaf spring 50 is shoWn as resting against the narroW25

prevents the locking plate 28 and pin 30/32 from being

WithdraWn through the opening 34 in the dust plate 26.When the key 21 is rotated to the position shoWn in FIG. 6,the dotted line con?guration of the spring 50 occurs, Where

FIGS. 2 through 7 of the draWings. It includes a central

portion 24 in the form of a rigid plug (preferably made of

metal or high impact plastic) having a surface con?gured to

the spring 50 is loWered beneath the shoulder on the rear side

35

the invention is to be considered illustrative and not as

occupies the space betWeen the trigger 14 and the rear of the45

1. A trigger lock for guns having a trigger guard and

trigger therein With a space betWeen the rear of the trigger

and the trigger guard, said lock including in combination:

a rigid plug member having a central portion con?gured

the lock is being installed; so that unintentional movement

of the trigger is minimiZed.

Alocking plate 28 has a con?guration Which is similar to

to ?t into the space betWeen the rear of a trigger and a

trigger guard of a gun to prevent depression of said

trigger to ?re the gun, said central portion of said rigid

the con?guration of the ?ange 20; and the locking plate hasa projecting retention pin 30 (preferably made of steel orother suitable alloy) extending from it. The pin 30 has a

plug having ?rst and second opposite sides;

a ?ange on the ?rst side of said central portion of said

rounded or bullet-shaped head or nose on it; and there is a

rigid plug member overlapping at least part of one of

groove or smaller diameter portion 32 betWeen the head 30

and the inside of the locking plate ?ange 28. As illustrated

in FIGS. 2 and 3, the pin 30 is inserted through an opening

of the head portion 30 of the pin. This then alloWs the pin30/32 to be Withdrawn from the cylindrical opening 40; sothat the locking plate 28 can be WithdraWn along With the pin30/32.The foregoing description of the preferred embodiment oflimiting. Various changes and modi?cations Will occur tothose skilled in the art for performing substantially the samefunction, in substantially the same Way, to achieve substantially the same result Without departing from the true scopeof the invention as de?ned in the appended claims.What is claimed is:

in FIG. 4; and the central portion 24 of the rigid plug

trigger guard 16, again as shoWn most clearly in FIGS. 1 and4. It should be noted that the trigger alWays is in vieW When

diameter portion 32 on the pin; so that the shoulder on the

reverse side of the head portion 30 engages the spring 50 and

operation of the handgun. The trigger lock is illustrated in

generally conform to the shape and siZe of the rear of the

trigger 14. The rear of the trigger lock central portion 24 alsois con?gured to generally conform to the shape and siZe ofthe trigger guard located to the rear of the trigger 14, asvieWed in FIG. 1. One side of the central portion 24 of theplug is covered by a ?ange 20, at least a portion of Whichextends over or beyond the trigger 14, as illustrated mostclearly in FIG. 1 and as also shoWn in the cross-sectionalvieW of FIG. 4. When the device is inserted into place, the?ange 20 overlies one side of the trigger 14, as clearly shoWn

in the interior of the block 24 and extends partially across the

loWer part of the passage 40, as illustrated in FIGS. 4 and 5.in the direction of the arroW in FIG. 5 to depress the end ofthe spring 50 doWnWard into the space 42, as shoWn in FIG.

the trigger 14 permits insertion of the index ?nger of the

user; and the space behind the trigger 14 alloWs the triggerto be pulled back to effect ?ring of the gun.To prevent accidental or unauthoriZed ?ring of the handgun 10 shoWn in FIG. 1, a trigger lock is inserted behind thetrigger to occupy the space behind the trigger 14 and the rearand bottom of the trigger guard 16 to prevent ?ring or

shaft of the key 21, With the shaft 21 extending through a

second cylindrical passage adjacent the passage 40 andparallel to it, but slightly offset beloW the passage 40, asillustrated in FIGS. 5 and 6. When the key shaft 21 isinserted through the opening 22, the projection on the end isguided through the slot 44, as shoWn in FIG. 6. Once the keyshaft 21 is fully inserted to the position Where the end of thekey shaft abuts the dust plate 26, the projection on the endof the key shaft overlies the spring 50, Which is captivated

55

said trigger and said trigger guard in engagement

thereWith, When said central portion of said rigid plugmember is located in said space;

34 in a dust plate 26, Which is placed on the side of the

central portion of the plug 24 opposite that of the ?ange 20.

the interior of said central portion of said rigid plug

When the pin 30/32 is inserted in the manner illustrated in

member having a holloW portion With access to said

FIGS. 2 and 3, the locking plate 28 is ?rmly engaged and

held in place inside the main body portion of the plug 24 by

in said rigid plug;

engagement of the pin 30/32 by a Wire or leaf spring 50

extending across a portion of a cylindrical passage 40, intoWhich the pin 30/32 is inserted.As shoWn in FIGS. 4, 5, 6 and 7, the interior of the centralportion 24 or plug portion of the lock is partially holloW. Thecylindrical passage 40 is provided for the pin 30/32, as

holloW portion provided in the form of a ?rst opening

a locking plate With an engagement member projectingtherefrom for insertion through a second opening on65

said second side of said central portion of said plug

member to overlap at least part of one of said triggerand said trigger guard in engagement thereWith on theopposite side of said trigger from said ?ange, said

6,055,7596

5engagement member comprising a projecting pin With

6. The combination according to claim 5 Wherein said

a free end and having a reduced diameter portion

central portion of said plug member has a trigger-engaging

surface dimensioned to generally correspond With thedimensions of the rear of said trigger and said central portionof said plug member is further dimensioned to correspondWith the shape of said trigger guard to the rear of said trigger.7. The combination according to claim 6 Wherein thesecond side of the central portion of said rigid plug member

betWeen said locking plate and the free end of said pinfor engagement by said releasable locking device; anda releasable locking device located in the holloW portionof said central portion of said rigid plug for engagingsaid engagement member on said locking plate tosecure said locking plate to said plug member therebylocking said trigger against use.2. The combination according to claim 1 Wherein said

releasable locking device comprises a ?exible spring

mounted in the holloW portion of said plug member andresting on said reduced diameter portion of said pin in thelocking position thereof and being releasable from thelocking position by movement out of engagement With thereduced diameter portion of said pin.

10

rigid plug, said ?rst ?ange and said locking plate are made15

10. The combination according to claim 2 Wherein said

free end of said projecting pin is tapered to cam said springinto engagement With said reduced diameter portion of said

inserted into the ?rst opening in said rigid plug.

4. The combination according to claim 3 Wherein said freeend of said projecting pin is tapered to cam said spring intoengagement With said reduced diameter portion of said pin5. The combination according to claim 4 Wherein said

holloW portion of said rigid plug member includes a guide

path for said projecting pin, and Wherein said ?exible springextends partially into said guide path for engagement by saidtapered free end of said pin as said locking plate is pressedinto place on said rigid plug member.

of metal.9. The combination according to claim 7 Wherein said

rigid plug, said ?rst ?ange and said locking plate are madeof plastic.

3. The combination according to claim 2 Wherein said

spring is designed to be moved out of engagement With thereduced diameter portion of said pin by means of a key

as said locking plate is pressed into locking engagement

With said rigid plug member.

is closed With a cover plate having an aperture located

therein providing access to the holloW interior thereof.8. The combination according to claim 7 Wherein said

pin as said locking plate is pressed into locking engagement

With said rigid plug member.11. The combination according to claim 10 Wherein said25

holloW portion of said rigid plug member includes a guide

path for said projecting pin, and Wherein said ?exible springextends partially into said guide path for engagement by saidtapered free end of said pin as said locking plate is pressedinto place on said rigid plug member.*